<template>
    <div>
      <!--面包屑-->
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!--卡片视图-->
      <el-card>
        <!--添加角色-->
        <el-row>
          <el-col>
            <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>
        <!--角色列表-->
        <el-table :data="rolesList" border stripe>
          <!--展开列-->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdBottom',i1===0 ? 'bdTop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                  <!--一级权限-->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!--二，三级权限-->
                <el-col :span="19">
                  <el-row :class="[i2===0 ? '':'bdTop','vcenter']" v-for="(item2 , i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色名称" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
              <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
      <!--分配权限dialog-->
      <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>

    </div>
</template>

<script>
  export default {
     data(){
       return{
         rolesList:[],
         //控制分配权限对话框的显示与隐藏
         setRightDialogVisible:false,
         //所有权限的数据
         rightsList:[],
         //权限列表树
         treeProps:{
           label:'authName',
           children:'children'
         },
         defkeys:[],
         //角色权限
         roleId:''
       }
     },
    created () {
       this.getRolesList()
    },
    methods:{
      async getRolesList(){
        const {data:res} = await this.$http.get('roles')
        if(res.meta.status !== 200){
          return this.$message.error('获取角色列表失败')
        }
        this.rolesList = res.data
        console.log(res.data)
      },
      //根据id删除权限
      async removeRightById(role,rightId){
        const confirmResult = await this.$confirm('确认删除此权限?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>(err))
        console.log(confirmResult)
        if(confirmResult!=='confirm'){
           return this.$message.info('取消了删除')
        }
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !==200){
          this.$message.error('取消权限失败')
        }
        //this.getRolesList()这样会刷新整页，下拉会关闭
        role.children = res.data //将返回值数据重新赋值到列表，不会刷新整页
      },
      //分配权限弹框
      async showSetRightDialog(role){
        this.roleId = role.id
        //获取所有权限列表
        const {data:res} =await this.$http.get('rights/tree ')
        if(res.meta.status !==200){
          this.$message.error('获取权限列表失败')
        }
        this.rightsList = res.data
        console.log(this.rightsList)
        this.getLeafKeys(role,this.defkeys)
        this.setRightDialogVisible=true
      },
      //通过递归形式，获取角色下所有三级权限的id，并保存到defkeys数组中
      getLeafKeys(node,arr){
        //如果当前node节点不包含children属性，则是三级节点
        if(!node.children){
          return arr.push(node.id)
        }
        node.children.forEach(item=>this.getLeafKeys(item,arr))
      },
      //监听分配权限的关闭事件，清空分配权限的数组
      setRightDialogClosed(){
          this.defkeys=[]
      },
      //点击为角色分配权限
      async allotRights(){
        //...展开运算符，合并数组
         const keys = [...this.$refs.treeRef.getCheckedKeys(),...this.$refs.treeRef.getHalfCheckedKeys()]
         console.log(keys)
         const idStr = keys.join(',')
         const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})
        if(res.meta.status !==200){
          this.$message.error('分配权限列表失败')
        }
        this.$message.success('取消权限失败')
        this.getRolesList();
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag{
    margin: 7px;
  }
  .bdTop{
    border-top: 1px solid #eee;
  }
  .bdBottom{
    border-bottom: 1px solid #eee;
  }
  .vcenter{
    display: flex;
    align-items: center;
  }
</style>
